206 BOTANY.lanceolate, hairy, acute, as long as or exceeding the pedicels; corollawhitish, 6" long. Choisy, in DC. Prod. vol. ix, p. 443, speaks of thepeduncles as being' 1-3-flowered. In all my specimens, the flowers aresolitary.—Ash Creek, Arizona (152 a, Loew, and 307). EvoLVULUS Aeizonicus, Gray.—Procumbent or ascending, 6-12' long,silky-hairy; leaves linear-lanceolate to lanceolate, acute, 4^10" long;peduncles capillary, 6-18" long, bracteate at the forks and bearing 1-3flowers (usually 3); flowers blue, 6-8" in diameter, salver-shaped; sepalsacute; anthers distinctly auriculate at base; pedicels reflexed after fall ofthe flower; ovary 1-celled.-^—Camp Grant, Ariz. (376 and 151 a, Loew,Arizona). Ceessa Ceetica, L., var. Teuxillensis, Chois.—^Arizona. CUSCUTE^. By De. Geoege Engelmann. Cuscuta (Clistogeammica) salina, Engelm.—Stems slender, low;flowers (1^2^ lines long) delicate white, pedicelled in loose cymes; calyx-lobes ovate-lanceolate acute, as long as the similar but mostly broader andoverlapping denticulate lobes, and as the shallow-campanulate tube of thecorolla; filaments about as long as the oval anthers; fringed scales mostlyshorter than the tube, sometimes incomplete; styles equalling or shorterthan the somewhat pointed ovary; capsule surrounded (not covered) by thewithering corolla, mostly 1-seeded. Saline or brackish marshes in the Gila Valley on Suceda, Rothrock(333), 1874 ; also on the California coast, near Santa Barbara, on Frankeniaand Salsola, Rothrock (101), 1875. Similar to C. Californica, from whichit is at once distinguished by its larger flowers and the presence of theinfra-stamineal scales. Cuscuta (Clistogeammica) aevensis, Beyrich.—Ash Creek, on Soli¬dago, Rothrock (311), 1874, and Camp Lowell, on Datura meteloides, Rothrock(708), 1874. These specimens, especially the latter, growing on a veryjuicy nurse-plant, have coarser stems than the Southeastern form and largerflowers and fruit; the calyx is not angular, its lobes rounded; those ofthe corolla very acute.